30 Jul Important physiological disorders of tomato and cole vegetables and their managements methods
टमाटर और गोभी वर्गीय सब्जियों के महत्वपूर्ण कायिक विकार और उनके प्रबंधन केे तरीके। Physiological disorders of Tomato 1. Blossom-end rot in Tomato This disorder of tomato that can appear on fruits at any time in their development, but most commonly appears when fruits are one-third to one-half grown. The initial symptoms are water-soaked spots on the blossom end of the fruit. These spots later enlarge and become black. Secondary infection by other decay causing organisms usually follows. The cause of this disorder is considered to be calcium deficiency in the developing fruit. Extreme fluctuations in moisture, root pruning and excessive nitrogen fertilization can also result in blossom end rot. Management: Avoid excessive application of Nitrogen particularly in ammonium form. Application of lime or calcium based fertilizers (eg. Calcium Ammonium Nitrate) as basal dose is commonly used to control this physiological disorder. Foliar spray of Calcium chloride (3 g/litre of water) also controls this disorder. 2. Catface in Tomato Catface is a condition involving malformation and scarring of fruits,particularly at blossom ends. Affected fruits are puckered with swollen protuberances and can have cavities extending deep into the flesh. Generally, any disturbance to flowers can lead to abnormally shaped fruits. Extreme heat, drought, low temperature, and contact with hormone-type herbicide sprays may cause flower injury. Management: Delayed pruning, balancing the internal...